<template>
    <div class="app-container">
        <!-- 查询表单 -->
        <!--查询表单-->
        <el-form :inline="true" class="demo-form-inline">
            <el-form-item>
                <el-input v-model="searchObj.roleName" placeholder="角色名称" />
            </el-form-item>

            <el-button type="primary" icon="el-icon-search" @click="fetchData()">查询</el-button>
            <el-button type="default" @click="resetData()">清空</el-button>
        </el-form>

        <!-- 工具条 -->
        <div>
            <el-button type="danger" size="mini" @click="addUser()">添加</el-button>
            <el-button type="danger" size="mini" @click="removeRows()">批量删除</el-button>
        </div>

        <!-- 角色列表 -->
        <el-table
            v-loading="listLoading"
            :data="list"
            stripe
            style="width: 100%"
            @selection-change="handleSelectionChange"
        >
            <el-table-column type="selection" width="55" />

            <el-table-column label="序号" width="70" align="center">
                <template slot-scope="scope">{{ (page - 1) * limit + scope.$index + 1 }}</template>
            </el-table-column>

            <el-table-column prop="roleName" label="角色名称" />

            <el-table-column label="操作" width="200" align="center">
                <template slot-scope="scope">
                    <router-link :to="'/acl/role/distribution/'+scope.row.id">
                        <el-button type="info" size="mini" icon="el-icon-info"></el-button>
                    </router-link>
                    <router-link :to="'/acl/role/update/'+scope.row.id">
                        <el-button type="primary" size="mini" icon="el-icon-edit"></el-button>
                    </router-link>
                    <el-button
                        type="danger"
                        size="mini"
                        icon="el-icon-delete"
                        @click="removeDataById(scope.row.id)"
                    ></el-button>
                </template>
            </el-table-column>
        </el-table>

        <!-- 分页组件 -->
        <el-pagination
            :current-page="page"
            :total="total"
            :page-size="limit"
            :page-sizes="[5, 10, 20, 30, 40, 50, 100]"
            style="padding: 30px 0; text-align: center;"
            layout="sizes, prev, pager, next, jumper, ->, total, slot"
            @current-change="fetchData"
            @size-change="changeSize"
        />
    </div>
</template>

<script>
import roleApi from "@/api/acl/role";

export default {
    data() {
        return {
            listLoading: true, // 数据是否正在加载
            list: null, // 讲师列表
            total: 0, // 数据库中的总记录数
            page: 1, // 默认页码
            limit: 10, // 每页记录数
            searchObj: {}, // 查询表单对象
            multipleSelection: [], // 批量选择中选择的记录列表
        };
    },

    // 生命周期函数：内存准备完毕，页面尚未渲染
    created() {
        console.log("list created......");
        this.fetchData();
    },

    // 生命周期函数：内存准备完毕，页面渲染成功
    mounted() {
        console.log("list mounted......");
    },

    methods: {
        // 当页码发生改变的时候
        changeSize(size) {
            console.log(size);
            this.limit = size;
            this.fetchData(1);
        },

        addUser() {
            this.$router.push({ path: "/acl/role/form" });
        },

        // 加载讲师列表数据
        fetchData(page = 1) {
            console.log("翻页。。。" + page);
            // 异步获取远程数据（ajax）
            this.page = page;

            roleApi
                .page(this.page, this.limit, this.searchObj)
                .then((response) => {
                    this.list = response.data.roles;
                    this.total = response.data.rows;

                    // 数据加载并绑定成功
                    this.listLoading = false;
                });
        },

        // 重置查询表单
        resetData() {
            console.log("重置查询表单");
            this.searchObj = {};
            this.fetchData();
        },

        // 根据id删除数据
        removeDataById(id) {
            // debugger
            this.$confirm("此操作将永久删除该记录, 是否继续?", "提示", {
                confirmButtonText: "确定",
                cancelButtonText: "取消",
                type: "warning",
            })
                .then(() => {
                    // promise
                    // 点击确定，远程调用ajax
                    return roleApi.delete([id]);
                })
                .then((response) => {
                    this.fetchData(this.page);
                    if (response.success) {
                        this.$message({
                            type: "success",
                            message: "删除成功!",
                        });
                    }
                })
                .catch(() => {
                    this.$message({
                        type: "info",
                        message: "已取消删除",
                    });
                });
        },

        // 当表格复选框选项发生变化的时候触发
        handleSelectionChange(selection) {
            console.log("handleSelectionChange......");
            console.log(selection);
            this.multipleSelection = selection;
        },

        // 批量删除
        removeRows() {
            console.log("removeRows......");

            if (this.multipleSelection.length === 0) {
                this.$message({
                    type: "warning",
                    message: "请选择要删除的记录!",
                });
                return;
            }

            this.$confirm("此操作将永久删除该记录, 是否继续?", "提示", {
                confirmButtonText: "确定",
                cancelButtonText: "取消",
                type: "warning",
            })
                .then(() => {
                    // promise
                    // 点击确定，远程调用ajax
                    // 遍历selection，将id取出放入id列表
                    var idList = [];
                    this.multipleSelection.forEach((item) => {
                        idList.push(item.id);
                        // console.log(idList)
                    });
                    // 调用api
                    return roleApi.delete(idList);
                })
                .then((response) => {
                    this.fetchData(this.page);
                    if (response.success) {
                        this.$message({
                            type: "success",
                            message: "删除成功!",
                        });
                    }
                })
                .catch(() => {
                    this.$message({
                        type: "info",
                        message: "已取消删除",
                    });
                });
        },

        // 执行搜索
        // queryString：文本框中输入的值
        // cb：一个函数
        querySearch(queryString, cb) {
            console.log(queryString);
            console.log(cb);

            // teacher.selectNameByKey(queryString).then(response => {
            //   // 调用 callback 返回建议列表的数据
            //   cb(response.data.items)
            // })
        },
    },
};
</script>

